fix return value checks of cbfstool's writerom

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5644 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 14 insertions, 2 deletions

diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c
index b071864b5c..8478c5a492 100644
--- a/util/cbfstool/common.c
+++ b/util/cbfstool/common.c
@@ -90,11 +90,23 @@ void *loadrom(const char *filename)
 	return romarea;
 }
 
-void writerom(const char *filename, void *start, uint32_t size)
+int writerom(const char *filename, void *start, uint32_t size)
 {
 	FILE *file = fopen(filename, "wb");
-	fwrite(start, size, 1, file);
+	if (!file) {
+		fprintf(stderr, "Could not open '%s' for writing: ", filename);
+		perror("");
+		return 1;
+	}
+
+	if (fwrite(start, size, 1, file) != 1) {
+		fprintf(stderr, "Could not write to '%s': ", filename);
+		perror("");
+		return 1;
+	}
+
 	fclose(file);
+	return 0;
 }
 
 int cbfs_file_header(uint32_t physaddr)